Daremo_06

So I have had the car for almost a week now, and its been consistantly throwing 2 EGT codes, plus today a EGR code popped up. I am going back to the shop tomorrow, but I wanted opinions on these codes.

This was today..

Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,08,15,16,17,35,36,37,45,55,56

Address 01 -------------------------------------------------------
Controller: 4B0 907 551 AA
Component: 2.7l V6/5VT G 0001
Coding: 06712
Shop #: WSC 02325
WAUED64BX1N073385 AUZ7Z0Y1627114
3 Faults Found:
17862 - Exhaust Gas Temp Sensor 1 (G235): Short to Ground
P1454 - 35-00 - -
17867 - Exhaust Gas Temp Sensor 2 (G236): Implausible Signal
P1459 - 35-10 - - - Intermittent
16826 - EVAP Emission Control Sys: Small Leak
P0442 - 35-00 - -
Readiness: 0000 0000

This was 2 days ago

Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,08,15,16,17,35,36,37,45,55,56

Address 01 -------------------------------------------------------
Controller: 4B0 907 551 AA
Component: 2.7l V6/5VT G 0001
Coding: 06712
Shop #: WSC 02325
WAUED64BX1N073385 AUZ7Z0Y1627114
2 Faults Found:
17861 - Exhaust Gas Temp Sensor 1 (G235): Open or Short to Plus
P1453 - 35-10 - - - Intermittent
17865 - Exhaust Gas Temp Sensor 2 (G236): Open or Short to Plus
P1457 - 35-10 - - - Intermittent
Readiness: 0000 0000

And this was Sunday when I got home from picking the car up.

Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,08,15,16,17,35,36,37,45,55,56

Address 01 -------------------------------------------------------
Controller: 4B0 907 551 AA
Component: 2.7l V6/5VT G 0001
Coding: 06712
Shop #: WSC 02325
WAUED64BX1N073385 AUZ7Z0Y1627114
2 Faults Found:
17862 - Exhaust Gas Temp Sensor 1 (G235): Short to Ground
P1454 - 35-00 - -
17865 - Exhaust Gas Temp Sensor 2 (G236): Open or Short to Plus
P1457 - 35-10 - - - Intermittent
Readiness: 0000 0000


Now is there a significant difference between short to ground and open or short to plus as far as if the EGR is definately bad? Could the short to grounds just be poorly mated connections? Should I just get 2 new EGT sensors?